﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace MyFifteenthWPFDemo
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void TextBox_SelectionChanged(object sender, RoutedEventArgs e)
        {
            if (this.txtSelection == null)
                return;
            this.txtSelection.Text = $"Selection from {this.textBox.SelectionStart} to len {this.textBox.SelectionLength} is {this.textBox.SelectedText}";
        }
    }
}
